Add support for IME_FLAG_NO_PERSONALIZED_LEARNING on Android

[Renzo-Olivares]

Description

This change adds support for the IME_FLAG_NO_PERSONALIZED_LEARNING on Android see more details here. There is no equivalent on iOS.

Framework PR: flutter/flutter#87002

Related Issues

Fixes flutter/flutter#73046

Tests

Pre-launch Checklist

• I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
• I read the [Tree Hygiene] wiki page, which explains my responsibilities.
• I read and followed the [Flutter Style Guide] and the [C++, Objective-C, Java style guides].
• I listed at least one issue that this PR fixes in the description above.
• I added new tests to check the change I am making or feature I am adding, or Hixie said the PR is test-exempt. See [testing the engine] for instructions on
  writing and running engine tests.
• I updated/added relevant documentation (doc comments with ///).
• I signed the [CLA].
• All existing and new tests are passing.

[justinmc]

LGTM 👍

The only thing to consider is the name requestPrivacy, as you pointed out in the framework PR. At first glance it sounds like it could be mistaken by developers for doing what obscureText does, but I don't have a better idea... The style guide has some guidance on naming but nothing really relevant here. Maybe @HansMuller has an opinion?

[GaryQian]

+1 on the name reconsideration. requestPrivacy doesn't sound quite intuitive and has no indication it is for the IME without going deeper to read the docs. The Privacy part of the name doesn't really carry the nuance or detail to describe what the flag actually does.